COMMENTS

Based on preliminary observations we propose for the Cansiglio Source the 
following geometrical characteristics:

- the length (12 km) is based on scaling with width, constrained by empirical 
relationship between magnitude and rupture area;

- the down-dip width (7.3 km) is based on the assumptions made concerning the 
minimum and maximum faulting depth, constrained by empirical relationship of 
rupture area with respect to the magnitude;

- the strike (N230) is chosen according with the general orientation of mapped 
tectonic structures;

- the fault dips 50 towards the northwest;

- the rake is assumed to be 64 (reverse faulting with left-lateral component) based on 
strike and on general geodynamic considerations;

- the minimum and maximum depth (1.0 and 6.6 km respectively) are constrained by 
subsurface geology and lack of evidence of coseismic surface faulting;

The 18 October 1936 earthquake is the only event reported in the current catalogues 
(CPTI, 1999) that can be associated with the Cansiglio Source based on damage 
distribution.

We propose that the Cansiglio Source is a segment of the Maniago reverse fault, 
which is the southernmost thrust front of the Venetian Alps.

The area that experienced the strongest effects is found just south of the Cansiglio 
and in the Alpago valley. These are the same zones that suffered the strongest effects 
during the 1873 Me=6.3 Bellunese earthquake.


OPEN QUESTIONS

1) What is the true faulting mechanism of the Cansiglio Source?

2) What are the relationships between the Cansiglio Source and the Alpago Source?

3) What are the slip rate and the average return time of the Cansiglio Source?
